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About Me

I am an employment lawyer. I represent employees and counsel small businesses in workplace disputes relating to the rate, method, and sufficiency of employee compensation. 

I focus my practice on litigating claims wherein the central questions are: (1) determinations of status or classification as employee or independent contractor; (2) questions of employee classification as exempt or not exempt for purposes of Federal and State overtime compensation requirements; and (3) disputes as to owed or unpaid wages and/or commissions.

In my career as an attorney, I have litigated several hundred Federal and State employment law claims including Class Actions and Collective Actions. 

I am an active member of the National Employment Lawyers Association, Maryland Employment Lawyers Association, and the Metropolitan Washington Employment Lawyers Association. I am also co-chair of the Employment Law Section of the Bar Association of Montgomery County, Maryland.


Practice Areas


  1. Employment & Labor: 85%
  2. Litigation: 15%


Payment Types:

Cash, Check, Credit Card

Attorney Endorsements

15 total 

  • Zachary Myles Lipp

    I endorse this lawyer. Gregg is passionate about the clients he represents. My practice is limited to personal injury and when my clients ask me who I recommend if they have an employment law matter I, without hesitation, refer them to Gregg and will continue to do so.


    Zachary Lipp Personal Injury Attorney
    Relationship: Fellow lawyer in community

  • No photo

    I endorse this lawyer for all Employment and Labor Law issues. Mr. Greenberg gets results.


    Clifford Neubauer Car Accidents Attorney
    Relationship: Friend

Contact Info

Zipin, Amster & Greenberg, LLC

836 Bonifant Street
Silver Spring, MD, 20910


VAAuthorized to practice law201003/11/2014
DCActive 200905/25/2015

Professional Misconduct

We have not found any instances of professional misconduct for this lawyer.
Avvo Contributions
Legal Answers
Award NameGrantorDate Granted
Super Lawyer - - Employment Law LitigationSuper Lawyers Magazine2015
Super Lawyer - - Employment Law LitigationSuper Lawyers Magazine2014
Rising Star - - Employment Law LitigationSuper Lawyers Magazine2013
Work Experience
TitleCompany NameDuration
PartnerZipin, Amster & Greenberg, LLC2014 - Present
AssociateThe Zipin Law Firm, LLC2007 - Present
Association NamePosition NameDuration
Montgomery County, Maryland Inn of CourtN/A2011 - Present
Bar Association of Montgomery CountyChair Employment Law Section2011 - Present
Metropolitan Washington Employment Lawyers AssociationN/A2007 - Present
Maryland Employment Lawyers AssociationVice President2007 - Present
National Employment Lawyers AssociationN/A2007 - Present
School NameMajorDegreeGraduated
University of Detroit Mercy School of LawN/AJuris Doctor2007
Indiana UniversityN/AN/A2004
Speaking Engagements
Conference NameTitleDate
Employment Law Brown BagUnderstanding the FLSA Tip CreditN/A